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[OM] Re: SanDisk Extreme III performance, was: Re: CF card prices

Subject: [OM] Re: SanDisk Extreme III performance, was: Re: CF card prices
From: Mark Dapoz <md@xxxxxxxxxxxx>
Date: Thu, 9 Feb 2006 00:16:35 -0500 (EST)
On Wed, 8 Feb 2006, Chuck Norcutt wrote:

> So, how come the E-1 only gets 3570 KB/sec from the Ultra II (also close
> to dpreview's E-1 test) while it's able to run at 4998 KB/sec with the
> Extreme III?  If these CF cards were physical drives I'd be looking at
> things like head motion and rotational delays to explain the
> differences.  There must be things about CF card performance that I
> simply do not understand.  Anybody know?

To achieve the faster speeds on the newer cards they likely have introduced
faster micro-controllers and more parallelism of the flash devices.  This
would also benefit the lower speed interfaces as long as they're not already
fully saturated.  They may also be introducing newer flash programming
algorithms which take less time to program each word.  It has been a while
since I wrote a flash driver so I'm not up on all the latest techniques.
                                        -mark

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